Controlling undesired fore and aft oscillations of a motor vehicle
US6718943B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2001 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Apr 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In order to control vehicle shuffle, ie undesired fore and aft oscillations of the vehicle, the invention discloses a method comprising the steps of:continuously sensing the speed of the vehicle motor and producing a signal representing the speedanalysing the speed signaldetermining a mean value for the speed signalidentifying fluctuations from the mean valuefiltering the signal to remove the mean value and to retain the fluctuationsapplying a phase change to the filtered signalapplying a deadband such that signals below a predetermined magnitude are ignoredamplifying the filtered and phase changed signal resulting from the deadband application, andsupplying the filtered, phase changed and amplified signal to a controller which controls the torque output of the vehicle motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.